Cushion material for bottle closures



1,638,541 9 1927 c. E. MCMANUS CUSHION MATERIAL FOR BOTTLE CLOSUHES Filed July 6, 1922 (2241 7%WNVIQT0R WZZMMZW A TTORNEY.

Patented Aug. 9, 1927.

UNITED STATES.

CHARLES E. -Mc ]![A1\TUS, OF-NEW YORK, N. Y.

*cusnron MATERIAL non BOTTLE GLOSURES.

Application filed July 6,

My invention relates to cushion material for bottle closures, and more particularly to material adapted to be used in lieu of the natural, or composition, cork disks now 5 commonly used in closures of the type generally known as Crown caps.

The main object of my invention is to provide cushion material embodying therein j in a unitary structure in strip form, material having sufficient resiliency to permit the formation of a tight seal when applied under pressure to the mouth of a bottle; suflicient rigidity to permit disks to be cut therefrom and applied to the metal shell of a closure by a closure assembling machine, and a facing impermeable to gas and liquid, to be presented toward the contents of a bottle, said facin compressibllity to yield with the cushioning portion of the material as a closure containing same is applied to a. bottle in the usual manner.

The cushion material embodying my invvention, preferably consists of a plurality of superimposed laminae firmly bonded together by means of suitable binders, adhesives or glues, one outer lamina being sofa; vulcanized rubber or rubber substitute, and the other outer lamina being of an oil or wax fibrous material such as paper, an intermediate lamina preferably being provided for the purpose of giving additional body to the material and ensuring a better bonding of the rubber or'r'ubber substitute lamina and the oil or wax treated lamina with relation to each other in the strip material of which they form parts. The invention consists primarily in cushion material for bottle closures embodying therein, in a unitary structure and in strip form, a lamina of resilient material and a facing lamina permanently united thereto and consisting of a liquidand gas impervi-' ous flexible fibrous material; and in such other novel characteristics as are hereinafter set forth and described and more particularly pointed out in the claims hereto appended. In the accompanying drawing, I have illustrated in' perspective a short section of a strip of cushion material embodying my invention, broken away to disclose the different laminae. i

In the embodiment of my invention shown in the drawing, the cushion material is composed of one outer or cushion lamina a of soft vulcanized rubber or ofa resilient rubhaving suflicient flexibility or- 1922. Serial No. 573,178.

ber substitute, and the other outer lamina i or facing material 6 composed of suitable fibrousmaterial, such as paper so treated with 011 or wax as to be substantially impermeable by gas and liquid such as are ordlnarily present in different beverages. Said cushion lamina a and said facing lamina b are united preferably by means of an intermediate lamina c of fibrous material, prefer ably untreated paper being used, since'this I lamina never contacts with the contents of a bottle and a better bond may be secured when thls intermediate stratum is absorptive and permeable by thebindenadhesive or glue used in uniting the cus'hionand fac ing laminae with relation to each other to the intermediate lamina c, I preferably provide a stratum of a binder, adhesive .or a

glue such as an asphaltum cement which has the characteristic ,of being moisture repellant, between the laminae b and 0, although any other flexible adhesive may be used in lieu thereof. p v

In the production of cushion material embodying" my invention, the various laminae are independently fed and collected, the adhesive being applied thereto during the feedlng operation, said strips when collected, being forced together under pressure and preferably in an elevated temperature so as" to ensure a tight continuous joint between the adjacent laminae. v

The finished strip as a whole, will possess the necessary thickness, resiliency and flexibility to permit disks cut therefrom to be used instead of cork disks in bottle closures,

and possesses the further advantage that it may be used in a machine'in strip form and the cushion disks cut therefrom and applied directly to the metal shell, each disk being free from surface voids of a magnitude which will not be closed as 'a result of the application of pressure to the closure in applying it to a bottle. I i

Ordinarily the thickness of the material will be approximately one-half that of the This thickened portion will of necessity have relatively greater resiliencythan the portion with which the top of a bottle contacts, so

7 that a tight seal may be effected at the curvature at the top of the bottle as well as at the high point of the side of the bead. Furthermore, the cushion lamina a when a disk is cupped and folded as described, will engage both the bead of a bottle and the material of the shell of the closure, which is a highly desirable condition in such closures. I

In the production of closures embodying the cushion material of my invention. the lamina a will be cemented to the shell of the closure, the arrangement of this lamina, iowever, being such that under no circumstances can moisture or gases from the bottle penetrate through the adhesive securing the material to the shell, since the rubber or rubber substitute is immune to the action of water, and chemicals or gases ordinarily found in beverages, and furthermore when cupped Will vent such matter to atmosphere if it escapes through the seal.

It is not my intention to limit the invention to the exact adhesives or glues used, since there is awide range of selection in such materials as well as in the fibrous materials in the laminae b and 0, nor to the method of producing the material. p

I have found'that the lamina b may be made of a special Well .known commercial product consisting of an oil impregnated paper known in the art as insulating paper, which may be readily handled and bonded while possessing the desired non-absorptive and gas impervious properties.

Having described the invention, what'I claim as new and desire to have protected by Letters Patent, is

l. Cushion material for bottle closures embodying therein, in a unitary structure and in strip form, a lamina of resilient material, a facing lamina consisting of liquid and gas impervious fibrous material, an intermediate lamina of fibrous material bonded to said resilient material, and a stratum of moisture resisting cement bonding said interrubber, a facing lamina consisting of liquid and gas' impervious fibrous material, an intermediate lamina of fibrous material bonded to said lamina of soft vulcanized rubber, and a stratum of moisture resisting cement bonding said intermediate and said facing lamina.

Cushion material for bottle closures embodying therein in a unitary structure and in strip form, a lamina of resilient material, a facing lamina consisting of a liquid and gas impervious flexible fibrous material, and an intermediate lamina of absorptive, fibrous material readily permeable by a, binding material, whereby the uniting of such other lamina is secured through the medium of said intermediate lamina. c

4. Cushion material for bottle closures embodying therein in a unitary structure and in strip form, a lamina of soft vulcanized rubber, a facing lamina consisting of a liquid and gas impervious flexible fibrous material, and an intermediate lamina of absorptive, fibrous material readily permeable by a binding material, whereby the uniting of such other lamina is secured through the -medium of said intermediate lamina.

5. Cushion material for bottle closures 

